--- title: "MUJI Compact Fountain Pen: 11 cm, 0.5 mm, Cartridges" canonical: "https://stationerytimes.com/guides/muji-compact-fountain-pen/" description: "MUJI Compact Fountain Pen explained: 11 cm long with a clip, 0.5 mm nib, two black cartridges included, cartridge fit, made for A7 notebooks, price band and origin." category: "Pens" type: "Fountain pen" published: 2026-11-01 updated: 2026-11-01 author: "Ellis Penhale" publisher: "Stationery Times" sources: 3 products: - name: "MUJI Compact Fountain Pen" brand: "MUJI" brand_origin: "Japan" made_in: "China" material: "Polycarbonate body, ABS resin parts (per MUJI USA)" price_band: "$$ ($5–20 per pen (multi-packs divided by the count), typical US retail, October 2026)" manufacturer: "Ryohin Keikaku Co., Ltd." model: "Compact Fountain Pen (NBF4CC4S)" gtin: "4550583693404" url: "https://www.muji.us/products/compact-fountain-pen-nbf4cc4s" --- # MUJI Compact Fountain Pen: 11 cm, 0.5 mm, Cartridges > The MUJI Compact Fountain Pen is a short capped fountain pen with a clip and a 0.5 mm nib. MUJI USA lists it at 11 cm (4.3 in), includes two black ink cartridges, says only MUJI's compact cartridges fit, and gives China as the origin. - URL: https://stationerytimes.com/guides/muji-compact-fountain-pen/ - Category: Pens - Author: Ellis Penhale - Published: 2026-11-01 - Updated: 2026-11-01 ![MUJI Compact Fountain Pen capped, drawn to scale at 11 cm with a clip](https://stationerytimes.com/images/raster/muji-compact-fountain-pen-illustration-16x9.png?v=8a2e54a3) *The capped compact fountain pen at MUJI USA's listed 11 cm (1 mm = 7.95 px).* Original illustration made for this guide. © Stationery Times. Original drawing (SVG): . Drawings © 2026 Stationery Times, reusable with credit under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). ## Product facts | Product | Brand | Brand origin | Made in | Material | Released | Price range (typical US retail, October 2026) | |---|---|---|---|---|---|---| | MUJI Compact Fountain Pen | MUJI (by Ryohin Keikaku Co., Ltd.) | Japan | China | Polycarbonate body, ABS resin parts (per MUJI USA) | – | $$: $5–20 per pen (multi-packs divided by the count) | - Made in (MUJI Compact Fountain Pen): China. MUJI USA's product details give "Country/Region of Origin: China". Source: https://www.muji.us/products/compact-fountain-pen-nbf4cc4s - Good for: Everyday carry, First pen. ## Key takeaways - MUJI USA lists the pen at 4.3 in (11 cm) long with a 0.5 mm nib and a clip, with a polycarbonate body and ABS resin parts. - It comes with 2 black ink cartridges, and only the compact fountain pen cartridges (5-pack, black) fit it. - MUJI says it is the perfect size for an A7 notebook; line thickness varies with writing pressure. - MUJI USA gives China as the origin, and the pen is in our $$ band ($5–20). - MUJI USA's care note says to avoid shaking the pen to prevent staining. ## What is the MUJI Compact Fountain Pen? **It's a short, capped, cartridge-filled fountain pen with a 0.5 mm nib, made to go with MUJI's A7 notebooks.** MUJI USA calls it a compact version of its fountain pen, cute and portable. MUJI is the brand of Ryohin Keikaku, the Japanese retailer. It comes with 2 black ink cartridges, so you can write the day it arrives. ## MUJI compact fountain pen specs | Spec | Value | |---|---| | Maker | MUJI (Ryohin Keikaku Co., Ltd.), Japan | | Type | Cartridge fountain pen with clip | | Length | 4.3 in (11 cm) | | Nib | 0.5 mm (line varies with pressure) | | Materials | Polycarbonate body, ABS resin parts | | Included | 2 black cartridges | | Barcode | 4550583693404 | | Made in | China (MUJI USA) | MUJI USA gives no weight or barrel width, so the barrel in our drawing is drawn by eye. ## Who is the MUJI compact fountain pen for? **It suits someone who wants to try a fountain pen cheaply, in a size that fits a small pocket.** - **Everyday carry:** it is 110 mm (4.3 in) long, and MUJI USA says the clip fits a pocket, lanyard or closed notebook. - **First pen:** it is in our $$ band, uses cartridges, and comes with 2 black ink cartridges, per MUJI USA. Skip it if you want to use bottled ink or a converter: MUJI USA lists none for this pen. ![The 11 cm MUJI compact fountain pen standing beside an A7 notebook 10.5 cm tall, to scale](https://stationerytimes.com/images/muji-compact-fountain-pen-beside-a7-notebook.svg?v=7db33d79) *The pen is half a centimetre taller than the 10.5 cm A7 notebook it is made for (1 mm = 2.4 px). Original illustration made for this guide. © Stationery Times.* ## Which cartridges fit? **Only MUJI's compact fountain pen cartridges fit, says MUJI USA.** It sells them as a black 5-pack. MUJI's longer fountain pen cartridges don't fit, and MUJI USA warns the same of its aluminum fountain pen set. Standard international cartridges are a different shape, so don't assume they will fit. Our [best fountain pen ink cartridges](https://stationerytimes.com/guides/best-fountain-pen-ink-cartridges/) guide covers the common types. ## Does it fit the A7 notebook? **MUJI USA says it is the perfect size for an A7 notebook, and sells a Compact Notebook A7 with a pen loop.** The pen is 11 cm long and the notebook 10.5 cm tall, so it stands half a centimetre taller than the notebook, per the listed sizes. ## How does it compare with MUJI's other compact pens? **It costs more than the gel pen and holds ink you can't change in colour as easily.** | | Compact fountain | [Compact gel pen](https://stationerytimes.com/guides/muji-compact-gel-ink-pen/) | |---|---|---| | Length | 11 cm | 11 cm | | Nib | 0.5 mm | 0.5 mm | | Refill | Compact cartridges | Not stated | | Price band | $$ | $ | | Made in | China | China | For a first fountain pen from other makers, see our [best fountain pens for beginners](https://stationerytimes.com/guides/best-fountain-pens-for-beginners/). ## Where is it made, and what does it cost? **In China: MUJI USA gives China as the country or region of origin.** The pen is in our $$ band ($5–20). MUJI USA sells it as Final Sale, with no refunds or exchanges; we read the page on November 1, 2026, and prices change. ## Frequently asked questions ### Does the MUJI compact fountain pen come with ink? Yes. MUJI USA says it comes with 2 black ink cartridges. ### Which cartridges fit the MUJI compact fountain pen? MUJI USA says only the compact fountain pen ink cartridges fit it, and sells them as a black 5-pack. Its longer cartridges don't fit. ### How long is the MUJI compact fountain pen? MUJI USA lists 4.3 in (11 cm) with the cap on. ### What size is the MUJI compact fountain pen nib? MUJI USA lists a 0.5 mm nib and says the line thickness can vary with writing strength. ### Is the MUJI compact fountain pen made in Japan? No. MUJI USA lists China as the country or region of origin. ### Can you shake a MUJI fountain pen to start the ink? MUJI USA says to avoid shaking the pen as much as possible, to avoid unnecessary staining. ### Can I return a MUJI pen bought online? MUJI USA marks it Final Sale, with no refunds or exchanges, on its product page as we read it. ## Sources - [MUJI USA: Compact Fountain Pen (length 4.3 in / 11 cm; nib 0.5 mm; polycarbonate and ABS resin; 2 black cartridges; compact cartridges only; China; read in full November 1, 2026)](https://www.muji.us/products/compact-fountain-pen-nbf4cc4s) - [MUJI USA: Compact Fountain Pen Ink Cartridge Refills - Black (5 Pack) (listing seen in the stationery collection)](https://www.muji.us/products/compact-fountain-pen-ink-cartridge-refills-nbf5cc4s) - [MUJI USA stationery collection (product list, read November 1, 2026)](https://www.muji.us/collections/stationery)